Using these words to make sentence in the present perfect tense:
1. I/ use/ this computer/ three years.
2. They/ visit/ Effiel Tower.
3. Nam/ be/ happy/ be had the computer.
4. We/ learn/ computer science/ a month.
5. She/ work/ at our school/ 2000.
6. I/ buy/ this house/ two years.
7. The printer/ stop working/ this morning.
8. They/ know/ the nảe of the company/ a long time.
9. He/ read/ the book/ 9 o'clock.
10. This computer/ is/ the best one/ I / ever use.